Subject: RE : [ids.analysis.forum] Availability of the first IDS DORIS Combination Series for ITRF2008
From: "Cerri Luca" <[email-masked]>
To: <[email-masked]>
Date: Wed, 25 Feb 2009 17:35:53 +0100

Dear all, 
is the change in scale mentioned below 
common to all satellites and AC solutions or is it specific to a particular satellite / AC solution?
Best regards
Luca
 
 -----Message d'origine-----
De : Lemoine, Frank G. (GSFC-698.0) [mailto:[email-masked]] 
Envoyé : jeudi 12 février 2009 20:17
À : [email-masked]
Objet : [ids.analysis.forum] Availability of the first IDS DORIS Combination Series for ITRF2008

	Dear colleagues-
	
	A first IDS weekly combined solution series has been produced as a DORIS contribution to the ITRF2008 call for participation.  From now, it is limited to the period 2003-2008  but it will be extended up to 1993 soon. The present combination is based on the contributions of six analysis centers - GOP (Geodetic Observatory Pecny); INASAN (Institute for Astronomy Russian Academy of Sciences); LCA; IGN; GAU (Geoscience Australia), and ESA (European Space Operations Center).  
	
	The Combination SINEX files are available at:
	ftp://ftp.cls.fr/pub/ids/combinations/ITRF2008-IDS/comb_snx/ 
	
	A very preliminary cumulative IDS solution has been generated by stacking all the combined solutions where WRMS, origin and scale time series WRT ITRF2005 are shown in the following plot: 
	  http://ftp.cls.fr/pub/ids/combinations/ITRF2008-IDS/comb_snx/t7p_comb.gif.
	
	More information about the IDS ACs participation is available at:
	 http://ids.cls.fr/html/analysis_coord/combination/itrf2008.html
	
	We remind the DORIS Analysts that the next IDS AWG is planned in Paris on March 23-24, 2009. At this meeting we will review the progress on the contributions of the analysis centers, the status of the IDS combination, and consider among other topics in particular the  abrupt change  in the scale of the IDS combination with respect to ITRF2005 in late 2004.
	
	Regards
	
	JJ. Valette, F. Lemoine and P. Ferrage

	

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